Lesson 9 Precast

PRECAST SEGMENTAL BRIDGE

SPEAKER Name: Kimio SAITO Affiliation: Kajima Corporation

December 6, 2005

SPEAKER April 1989 – August 1992: Design Engineer Design Div. of Kajima Corp.

Designed Concrete CableCable-stayed Bridge September 1992 – August 1994: Construction Engineer Osaka Branch of Kajima Corp.

Academic Background: Master of Engineering from Waseda Univ.

SPEAKER October 1996 – September 1998: Engineering Trainee LoBuono Armstrong and Associates, Florida

Designed Precast Segmental Box Girder Bridge

Constructed Concrete CableCable-stayed Bridge September 1994 – September 1996: Design Engineer Design Div. of Kajima Corp.

Designed Concrete Box Girder Bridge Utilizing Entire External Tendon System

SPEAKER October 1998 – March 2002: Senior Design Engineer Design Div. of Kajima Corp.

Designed Railway Bridge with Light Weight Concrete Designed “Uchimaki Viaduct” Viaduct” April 2002 – Present: Senior Construction Engineer Yokohama Branch of Kajima Corp.

Constructed “Uchimaki Viaduct” Viaduct”

SCHEDULE 1. General Information (10min.) 2. History and Applications in U.S. (15min.) 3. Recent Applications in Japan (10min.) 4. Case Study about Uchimaki Viaduct (15min.) 5. Movie of Uchimaki Viaduct Project (15min.) 6. Discussions (15min.)

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PRECAST SEGMENTAL BRIDGE

PRECAST SEGMENTAL BRIDGE

Definitions

Advantage and Disadvantage

Bridge girders are fabricated as a number of precast segments at a casting yard.

Shorten erection period

The precast segments are transported from the casting yard to an erection site.

Reduce the number of labors

Provide high quality members

The precast segments are erected and unified into a girder by applying longitudinal prestress.

PRECAST SEGMENTAL BRIDGE

PRECAST SEGMENTAL BRIDGE

Advantage and Disadvantage

Technical Aspects

Require large space for fabrication and storage

Special care for geometry control

Require effective transportation system

Special care for joints and keys

Require special fabrication & erection machines

Additional prestress

Require enough scale of project (contract)

FABRICATION & ERECTION

SHORT-LINE MATCH CAST 3. Shifting Segments(n &Adjusting n+1) 6. Re-bar Cage 8. 9.Concrete Setting Side Pouring Form &&Core Form 5. Soffit Form Segment(n+1) 2. 4. Hanging Soffit Form 7. Re-bar Cage & Taking Segment(n) out 10. Completion of Segment(n+2) 1.Start

Fabrication Method ShortShort-line or LongLong-line Match Cast CONCRETE

Complete

Erection Method

N

Balanced Cantilever (for long span)

N+1 Ｎ N+2 N+1

N N+1 N+1 N+ Ｎ N

N Ｎ

SpanSpan-byby-span (for short and medium span) Bulkhead

Wet cast

Match cast

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SHORT-LINE MATCH CAST

LONG-LINE MATCH CAST

Fixed Bulkhead & Movable Soffit Form Require small space for casting machine Suitable for girder with constant depth Correspond to alignment Require careful geometry control

LONG-LINE MATCH CAST

BALANCED CANTILEVER

Movable Bulkhead & Fixed Soffit Form Require large space for casting machine Suitable for girder with variable depth Suitable for straight bridge

SPAN-BY-SPAN

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PRECAST SEGMENTAL BRIDGE

Griffith Road Crossing

History & Applications in U.S.

• Single 15m Span II-girder • New York • 1950 and 1951

December 6, 2005

Photo: Provided by ASBI

Griffith Road Crossing

• Single 15m Span II-girder • New York • 1950 and 1951

JFK Memorial Causeway

• 60m 60m Center Span • Texas • 1972 Photo: Provided by ASBI

JFK Memorial Causeway

• 60m 60m Center Span • Texas • 1972

Photo: Provided by ASBI

Kishwaukee River Bridges

• 76m 76m Interior Spans • Illinois • 1979 Photo: Provided by ASBI

Photo: Provided by ASBI

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Kishwaukee River Bridges

• 76m 76m Interior Spans • Illinois • 1979

Long Key Bridge

• Florida • 1979 Photo: Provided by ASBI

Photo: Provided by ASBI

Long Key Bridge

• Florida • 1979

Seven Mile Bridge

• Florida • 1982 Photo: Provided by ASBI

Photo: Provided by ASBI

Seven Mile Bridge

• Florida • 1982

Windward Viaduct

• Hawaii • 1993 Photo: Provided by ASBI

Photo: Provided by ASBI

2

Garcon Point Bridge

VARIATIONS

• Florida • 1998 Photo: Provided by ASBI

Linn Cove Viaduct

• North Carolina • 1984

Sunshine Skyway Bridge

• Florida • 1987 Photo: Provided by ASBI

Sunshine Skyway Bridge

• Florida • 1987

Photo: Provided by ASBI

James River Bridge

• Virginia • 1990 Photo: Provided by ASBI

Photo: Provided by ASBI

3

New Baldwin Bridge

• Massachusetts • 1993

New Baldwin Bridge

• Massachusetts • 1993 Photo: Provided by ASBI

Natchez Trace Parkway

• Tennessee • 1993

Confederation Bridge

• Canada • 1996

Photo: Provided by ASBI

Confederation Bridge

• Canada • 1996

Confederation Bridge

• Canada • 1996

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APPLICATIONS IN URBAN AREA

San Antonio Y Project

• Texas • 1993 Photo: Provided by ASBI

San Antonio Y Project

• Texas • 1993

Photo: Provided by ASBI

I-75 / I-95 Interchange

• Florida • 1994 Photo: Provided by ASBI

MARTA

Photo: Provided by ASBI

Boston Project

• Georgia • 1985

• Massachusetts • 200X Photo: Provided by ASBI

Photo: Provided by ASBI

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STANDARD SEGMENT Develop Standard Segment Spans: 30.5m - 45.7m (Span by span) 30.5m – 61.0m (Balanced Cantilever) Width: 8.40m – 13.50m Girder Height: 1.80m – 3.00m

Supplied by Precast Makers Reduce Equipment Cost Extend the Application to Smaller Projects

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PRECAST SEGMENTAL BRIDGE Recent Applications in Japan

RECENT APPROACH The weight of segments are reduced by dividing the cross section into several parts. The segments can be transported through general highway by reducing the weight. The cost of erection machines can be reduced by light weight segments.

December 6, 2005

Furukawa Viaduct

• U shape Segment + Rib • Precast Panel

The erection period can not be minimized.

Furukawa Viaduct

• U shape Segment + Rib • Precast Panel

Reference: Bridge and Foundation Engineering

Furukawa Viaduct

• U shape Segment + Rib • Precast Panel Reference: Bridge and Foundation Engineering

Reference: Bridge and Foundation Engineering

Kamikazue Viaduct

• Dual Segment Reference: Bridge and Foundation Engineering

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Kamikazue Viaduct

• Dual Segment

Kamikazue Viaduct

• Dual Segment Reference: Bridge and Foundation Engineering

Uchimaki Viaduct

• Core Segment • External Strut • Cast in Place Wing Slab

Uchimaki Viaduct

• Core Segment • External Strut • Cast in Place Wing Slab

Reference: Bridge and Foundation Engineering

Uchimaki Viaduct

• Core Segment • External Strut • Cast in Place Wing Slab

Yamakiri Viaduct

• Core Segment • External Strut + Rib • Precast Panel Reference: Bridge and Foundation Engineering

2

Yamakiri Viaduct

• Core Segment • External Strut + Rib • Precast Panel Reference: Bridge and Foundation Engineering

Yamakiri Viaduct

• Core Segment • External Strut + Rib • Precast Panel Reference: Bridge and Foundation Engineering

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PRECAST SEGMENTAL BRIDGE Case Study about Uchimaki Viaduct

UCHIMAKI VIADUCT (PLOFILE) Nagoya

East Bound

Tokyo

　

West Bound

December 6, 2005

STRUTTED WING SLAB

CROSS SECTION

Concrete Struts Ac=11.910m2

ERECTION SEQUENCE

8.940m2

ERECTION SEQUENCE

Phase 3: 1: Span 2: Cast Assembling in byPlace Span Struts Pier Erection Segments + C.I.P. of Precast Wing Slabs Segments

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TYPICAL SEGMENT

CASTING YARD

１０，７４０

770 12.5φ 530

CASTING YARD

C.I.P. PIER SEGMENT

C.I.P. PIER SEGMENT

ERECTION SITE Casting Yard Highway＋River Highway Highway Highway

2

SEGMENT DELIVERY

e Er

ed ct

g id Br

e

SEGMENT DELIVERY

ck De

Casting Yard

SEGMENT DELIVERY

SPAN-BY-SPAN ERECTION ＳＴＥＰ １：セグメントの運搬・仮吊り 　　　　　　 引寄せ・接着

SPAN-BY-SPAN ERECTION ＳＴＥＰ ２：目地コンクリートの打設

SPAN-BY-SPAN ERECTION ＳＴＥＰ ３：主方向ＰＣ鋼材の挿入・緊張

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SPAN-BY-SPAN ERECTION ＳＴＥＰ ４：次径間への架設桁の移動

ERECTION TRUSS 106m 106m

WEIGHT: 7,840kN

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